I created a test bench for bond wire in ADS EM simulator and got the following graph in the picture I attached. I'm trying to compare the values which I got in ADS with theoretical one. But I'm confused how to do calculation of S-parameters in a two port network.

Kindly help me to calculate the S parameters and compare with the practical one. enter image description here

  • \$\begingroup\$ something like this? The first hit when I googled 'calculate s-parameters of series impedance'. \$\endgroup\$ – Neil_UK Dec 22 '15 at 13:22

The long answer is set up the problem like this:


simulate this circuit – Schematic created using CircuitLab

Now calculate the forward and reverse-travelling waves at each of the ports. This gives you \$S_{11}\$ and \$S_{21}\$.

Then hook up the generator on the other side of the device and calculate the forward and reverse travelling waves again to get \$S_{12}\$ and \$S_{22}\$.

But since you are already using ADS, there is an easier way: Hook up your device model between S parameter ports and simulate it. This will also make it easier to make ADS draw a graph comparing the simple model with the more complex model.

If your "theoretical" model is a simple combination of R, L, and C elements, you could even use the ADS optimizer to tune the theoretical model to match the phenomenological model (or vice versa), or to match some measurement data.


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